Cited by 101Ion channel regulation and functionNeuroscience and Neuropharmacology ResearchNeural dynamics and brain function

Ih from synapses to networks: HCN channel functions and modulation in neurons

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Combe, Crescent L., Gasparini, Sonia·2021·Progress in Biophysics and Molecular Biology

Abstract

Hyperpolarization-activated cyclic nucleotide gated (HCN) channels and the current they carry, I h, are widely and diversely distributed in the central nervous system (CNS). The distribution of the four subunits of HCN channels is variable within the CNS, within brain regions, and often within subcellular compartments. The precise function of I h can depend heavily on what other channels are co-expressed. In this review, we give an overview of HCN channel structure, distribution, and modulation by cyclic adenosine monophosphate (cAMP). We then discuss HCN channel and I h functions, where we have parsed the roles into two main effects: a steady effect on maintaining the resting membrane potential at relatively depolarized values, and slow channel dynamics. Within this framework, we discuss I h involvement in resonance, synaptic integration, transmitter release, plasticity, and point out a special case, where the effects of I h on the membrane potential and its slow channel dynamics have dual roles in thalamic neurons.

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Crossref · 10.1016/j.pbiomolbio.2021.06.002

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  • HCN channels open with membrane hyperpolarization to conduct Ih, a slowly activating inward flux that depolarizes dendrites, lowers input resistance, and tightens the temporal window for integration.

    “HCN channels open with membrane hyperpolarization to conduct the mixed cation current Ih, a slowly activating inward flux that depolarizes dendrites, lowers input resistance, and tightens the temporal window for integration [271,272].”

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Authors
Combe, C. L., & Gasparini, S.
Affiliations
Louisiana State University Health Sciences Center New Orleans (US)
Corresponding author
Gasparini, Sonia
Venue
Progress in Biophysics and Molecular Biology
Publisher
Elsevier BV
Published
2021-11
Volume
166
Pages
119-132
ISSN
0079-6107 (ISSN-L)
OpenAlex
W3173456444
Cited by
101
References
174
Citations by year
2026: 17 · 2025: 25 · 2024: 40 · 2023: 10 · 2022: 7 · 2021: 2
FWCI
1.55
Type
journal article
Language
en
Open access
Locations
  • Progress in Biophysics and Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (R01 MH115832)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
HCN channels, Ih current, hyperpolarization-activated current, cyclic nucleotide-gated channels, resting membrane potential, neuronal resonance, synaptic integration, neurotransmitter release, synaptic plasticity, thalamic neurons, central nervous system
MeSH terms
Membrane Potentials, Neurons, Synapses, Cyclic Nucleotide-Gated Cation Channels, Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels

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